The fuel-air mixture was compressed at a 10.5:1 ratio before ignition and the spent gas vented out of the cylinder through 1.65-inch exhaust valves. Ford 429 Cobra Jet engines were fed by a 700 ...
Furthermore, the Twister Special was powered by either the 429-ci (7.0-liter) Cobra Jet or the Super Cobra Jet Ford V8 ... higher-flow exhaust manifolds, and a 780-cfm Holley 4150 carb mounted ...